Part III.
Magnetism.
Chapter I.
Elementary Theory of Magnetism.
| Art. | Page |
|---|---|
| 371. Properties of a magnet when acted on by the earth | 1 |
| 372. Definition of the axis of the magnet and of the direction of magnetic force | 1 |
| 373. Action of magnets on one another. Law of magnetic force | 2 |
| 374. Definition of magnetic units and their dimensions | 3 |
| 375. Nature of the evidence for the law of magnetic force | 4 |
| 376. Magnetism as a mathematical quantity | 4 |
| 377. The quantities of the opposite kinds of magnetism in a magnet are always exactly equal | 4 |
| 378. Effects of breaking a magnet | 5 |
| 379. A magnet is built up of particles each of which is a magnet | 5 |
| 380. Theory of magnetic 'matter' | 5 |
| 381. Magnetization is of the nature of a vector | 7 |
| 382. Meaning of the term 'Magnetic Polarization' | 8 |
| 383. Properties of a magnetic particle | 8 |
| 384. Definitions of Magnetic Moment, Intensity of Magnetization, and Components of Magnetization | 8 |
| 385. Potential of a magnetized element of volume | 9 |
| 386. Potential of a magnet of finite size. Two expressions for this potential, corresponding respectively to the theory of polarization, and to that of magnetic 'matter' | 9 |
| 387. Investigation of the action of one magnetic particle on another | 10 |
| 388. Particular cases | 12 |
| 389. Potential energy of a magnet in any field of force | 14 |
| 390. On the magnetic moment and axis of a magnet | 15 |
